Subaru to Test onsemi Power Platform for Future EVs

Subaru Corporation has entered into a technology engagement with onsemi (NASDAQ:ON) to evaluate its Embedded Power Platform for potential deployment in future electric vehicle traction inverters.

The initial phase of the collaboration centers on technical assessment and engineering evaluation, expanding an existing business relationship between the two manufacturers. Through this arrangement, Subaru gains early access to simulation models, engineering samples, and dedicated technical support regarding onsemi's power integration technology.

"Advancing our electrification strategy requires us to continually assess technologies that can improve vehicle performance, efficiency and system integration," said Tamotsu Inui, Managing Executive Officer Chief General Manager of Engineering Division at Subaru, in a statement.

How the Embedded Power Platform Works

The Embedded Power Platform is designed to simplify power electronics by embedding multiple semiconductor devices directly into a silicon-based, wafer-level package. In electric vehicles, traction inverters convert direct current from the battery pack into alternating current to drive the electric motors, making inverter efficiency critical for overall driving range and thermal management.

Traditional inverter designs rely on discrete components mounted to printed circuit boards, which can occupy significant physical space and introduce parasitic inductance. By packing multiple devices into a unified wafer-level package, the onsemi architecture aims to reduce module footprints and improve electrical efficiency in high-power automotive environments.

"Our early engagement with onsemi gives us an opportunity to evaluate EPP’s integrated approach to power system design," Inui added.

Corporate Strategy and EV Development

Automotive suppliers and vehicle manufacturers have increasingly forged upstream partnerships to secure specialized semiconductor components ahead of expected production scaling. Integrating advanced power modules at the platform design phase allows automakers to optimize drivetrain packaging before committing to mass manufacturing.

"Subaru’s engagement brings customer insight to the platform’s development and explores how the integrated power architecture would support electrified vehicles," said Dinesh Ramanathan, Senior Vice President of Corporate Strategy at onsemi, in a statement.

While the current collaboration remains in the evaluation and technical assessment phase without commercial deployment commitments, the agreement positions both companies to align future EV powertrain architectures with evolving power electronics standards.